Re: Patch 0727d35de ("Make initramfs honor CONFIG_DEVTMPFS_MOUNT") breaks boot

From	Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Newsgroups	linux.kernel
Subject	Re: Patch 0727d35de ("Make initramfs honor CONFIG_DEVTMPFS_MOUNT") breaks boot
Date	2017-09-12 02:50 +0200
Message-ID	<uoHyN-2nS-3@gated-at.bofh.it> (permalink)
References	(2 earlier) <tKm6t-6oT-5@gated-at.bofh.it> <tKm6t-6oT-3@gated-at.bofh.it> <tKUhQ-4zw-11@gated-at.bofh.it> <uok9b-2JR-7@gated-at.bofh.it> <uovnY-2FY-17@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On (09/11/17 13:45), Petr Mladek wrote:
[..]
> > Except for the second printk line: If you boot with rdinit=/bin/hush
> > then the first time you mount -t devtmpfs /dev /dev after boot (with
> > CONFIG_DEVTMPFS_MOUNT already having mounted it), you get the 0 return
> > value but the last printk() doesn't output? The second and later times
> > you repeat it, both printk() lines are output.
> > 
> > What's up with printk?
> > 
> > (I added the second printk because the _first_ one wasn't outputting
> > that first time. Something is happening to flush the printk() queue
> > instead of writing it out?
> Maybe, we could setup the timer via an irq_work. We already use
> this trick for flushing deferred printk and waking klogd.
> It is not nice but it would be easier than the previous mess.

printk() and printf() have similar behaviour here. both flush on \n.
so let's keep it the way it is?

	-ss

Thread

Re: Patch 0727d35de ("Make initramfs honor CONFIG_DEVTMPFS_MOUNT")  breaks boot Rob Landley <rob@landley.net> - 2017-09-11 01:50 +0200
  Re: Patch 0727d35de ("Make initramfs honor CONFIG_DEVTMPFS_MOUNT")  breaks boot Petr Mladek <pmladek@suse.com> - 2017-09-11 13:50 +0200
    Re: Patch 0727d35de ("Make initramfs honor CONFIG_DEVTMPFS_MOUNT")  breaks boot Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> - 2017-09-12 02:50 +0200
    Re: Patch 0727d35de ("Make initramfs honor CONFIG_DEVTMPFS_MOUNT")  breaks boot Rob Landley <rob@landley.net> - 2017-09-13 04:50 +0200

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